Reading .tiff information

I have preprocessed an image which finaly gives angle values, since the image is in .img format. I have exported it to .tiff format and opened in Matlab. When i used imread function. The array is showing only 0 values, but image is in greyscale from white to black. secondly how can i get the angle values from the image.

[Walter Roberson]

how did you convert the .img to .tiff format?

What is class() of your input data? What is class() of the data you are writing? Are you possibly trying to write complex data?

Answer 1

[yanqi liu]

sir，may be use

t = Tiff('myfile.tif','r');

t = Tiff('cameraman.tif','r');
t

t = 
                  TIFF File: '/MATLAB/toolbox/images/imdata/cameraman.tif'
                       Mode: 'r'
    Current Image Directory: 1
           Number Of Strips: 8
                SubFileType: Tiff.SubFileType.Default
                Photometric: Tiff.Photometric.MinIsBlack
                ImageLength: 256
                 ImageWidth: 256
               RowsPerStrip: 32
              BitsPerSample: 8
                Compression: Tiff.Compression.PackBits
               SampleFormat: Tiff.SampleFormat.UInt
            SamplesPerPixel: 1
        PlanarConfiguration: Tiff.PlanarConfiguration.Chunky
           ImageDescription: This image is distributed by The MathWorks, Inc. with
permission from the Massachusetts Institute of Technology.
                Orientation: Tiff.Orientation.TopLeft

[Keerthana N]

Thanks for helping. but the array consists of 0 values for each rowas and columns. and how can i extract the angle values for the further analysis.

[Image Analyst]

What values did it originally have, after you imported it from the .img file but before you saved it as a TIFF file?

[Keerthana N]

basically it was in .img format. it has anlge values. This image consists only one band which consists angle values at each pixels. using imread sunction, the array is giving me 0 values, i have attached a file of it. since it has only one band, it has to show some values right. the whole 5463X2633 has values.

[Walter Roberson]

What shows up for nnz() applied to that array?